#ifndef _ARCH_AVR32_INTERRUPT_HANDLER_H_
#define _ARCH_AVR32_INTERRUPT_HANDLER_H_

/*
* Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
*    contributors may be used to endorse or promote products derived
*    from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
* SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* For additional information see http://www.ethernut.de/
*/

/*
* $Log: ihndlr.h,v $
*
*/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Nut/OS API.  It exists for the convenience
// of Interrupt Handling.  This header file may change from version
// to version without notice, or even be removed.
//
// We mean it.
//
//

//! Pointer to interrupt handler.
#if __GNUC__
typedef void (*__int_handler)(void);
#elif __ICCAVR32__
typedef void (__interrupt *__int_handler)(void);
#endif

extern void register_interrupt(__int_handler handler, unsigned int irq, unsigned int int_lev);

#define IRQ_ENTRY() \
{                                                                               \
	/* Prevent preempted interrupts disabling global interrupts */		        \
	__asm__ __volatile__ ("ssrf\t%0" :: "i" (AVR32_SR_GM_OFFSET));              \
                                                                                \
	/* Save R0..R7. Other registers are saved by the CPU if __AVR32_UC__ */		\
	/* Or by exception.S if __AVR32_AP7000__ */                                 \
	__asm__ __volatile__ ("pushm r0-r7");										\
}


#define IRQ_EXIT() \
{                                                                               \
	/* Restore R0..R7 */                                                        \
	__asm__ __volatile__ ("popm r0-r7");                                        \
                                                                                \
	/* Prevent preempted interrupts disabling global interrupts */		        \
	__asm__ __volatile__ ("csrf\t%0" :: "i" (AVR32_SR_GM_OFFSET));              \
}

#endif // _ARCH_AVR32_INTERRUPT_HANDLER_H_
